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H. L. SPENCER.

Millstone Dress. No. 78,768.- Patented June 9, 1868.

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described.

HEDGES L. =SPENOER, OF' SOCIAL CIRCLE; GEORGIA.

Letters Patent No. 7 8,768, dated June 9, 1868.

IMPROVED Murderous-Dense.

T6 ALL WHOM IT CONCERN Be it known that I, HEDGESL. SPENCER, of Social Circle, in the 'county of Walton, and State of Georgia, have invented nets and useful Improvements in the Dress of Millstones and I do herebydeclare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had tothe accompanyingdrawings, forming part of'this specification, in which- Figure 1 represents the face of a stone, havingfnrrows out according to myimproved method.

Figure 2 is a cross-section taken in the line w :v, fig.-1.

Similar letters of ret'erenc e indicate corresponding parts.

This; invention relates to an improved method of dressing millston es for grinding wheat, corn, or other grain; and the improvement consists in making angles or elbows in the leading furrowsat points about half way between the eye and the circumference of the stone, instead of straight fhrrows running directly from the eye to the circumference, by whichrarrangement of the furrowson both stones they cross each other in checks or diagonally. I I

Another feature of my improved method of 'dre ssing n'iillstones consists in starting the leading furrows wider at the eye, and narrowingit gradually to the angle'or-elbow, and then enlarging it again to the circumference. i v

The short'furrows are arranged between the leading furrows in conformity with this system of angles or elbows, and the enlargement of the channels towards, the circumference.

' A further improvement of'my intention consists in forming the second furrow so that it does not connect with or'enter into the leading furrow, hut has its oend separated therefrom by a band, about one-half or twothirds of the width of the other bands I v I I also maltea bosom, so called, or concave space around. the eyes of hoth rocks, making it nearly one quarter of anjnch deep at the-eye, and running out to a feather-edge-several inches from the eye.

The'advantages of my improved. millstonedrcss' are that the stones will grind faster, and make -better flour than with any ordinary dross, while'the mealis kept cooler, and bolts more freely and readily.

In the drawing,- the millstonerepresents'the runner of a pair of thills'tones. The furrows of bothjstones are cut alike. v v r I The leading furrowga a, are made with n 'elh'ow or an angle of'ahout forty-five degrees, at a point, 0?,

about halt' 'their distance betn'een' the eye and the circumference of the stone, and'th channels enlarge or widen from this point in both directions, to theinner ends, a, and the outer, ends,'a, of the furrows.

The secondfnrrows, Z1 6, do .not intersect the 'le'a'ding furrows, but leave a narrow band, f,' behind their inner end at their start, as shown in'the drawing.

But thc third furroivs, c c, intersect and start from the second furrows at g, and Widen to the circumference of the stone from'thepoint of starting. 7 I i Having described my'invention, I claim as new, and desire to secure by Letters Patent-- The improved millstone-dres's, composed of the furrows a, b, c, formed and arranged as herein shown and H. L. SPENCER.

Witnesses I J. S. BULLOCK, C. 'T. MORLEY. 

